﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace bai07_shard
{
    class Polygon {
     protected int width, height;
     public void setValues (int a, int b)
        { 
         width=a;
         height=b;
        }
    }
    class Rectangle: Polygon 
        {
             public int area ()
            {
             return (width * height);
             }
        }
    class Triangle: Polygon 
    {
     public int  area (){ 
          return (width * height / 2); 
    }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Rectangle recta = new Rectangle ();
            Triangle trgl = new Triangle ();
            recta.setValues (4,5);
            trgl.setValues (4,5);
            Console.WriteLine("rect a:{0}", recta.area());
            Console.WriteLine("trglb:{0}", trgl.area());
        }
    }
}
